The Asian Journal of Animal Science

Mohini Gadhia ¹, Rakesh Prajapati ¹

Affiliations
1 Department of Aquatic Biology, Veer Narmad South Gujarat University, Surat (Gujarat), IN

Abstract

Static renewal bioassay test was conducted to determine the toxicity of pyrithroid Cypermethrin (10% EC) insecticide on a freshwater teleost (Labeo rohita). Fishes were exposed to various concentrations of Cypermethrin for 96 h and the per cent mortality was recorded. The LC₅₀ value was found to be 0.06 ppm. Behavioural changes were observed in fish exposed to lethal concentrations exhibiting erratic and darting movements with imbalanced swimming.

Keywords

Labeo rohita, Cypermethrin, Behavioural Response.

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Rakesh Prajapati ¹, Mohini Gandhia ¹

Affiliations
1 Department of Aquatic Biology, Veer Narmad South Gujarat University, Surat (Gujarat), IN

Abstract

Cypermethrin is a widely used selective pesticide. Due persistent character, it is present in the surface waters, contaminating non-target organisms including fish. In the present study, fingerlings of Labeo rohita were exposed to a sublethal concentration (0.03 ppm) of Cypermethrin upto eight days of exposure. The histopathological changes in the gill tissue like mucus secretion, fusion of secondary gill lamellae, damage in central cord, lamellar aneurism, vacuolization, were noticed.

Keywords

Histopathological Changes, Gill, Cypermethrin.

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